20 results on '"Gleeson, B."'
Search Results
2. African swine fever
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Richards, K., primary, Gleeson, B., additional, and Cutler, R., additional
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- 2024
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3. An Expanded Model for the Pressure Effect in Metal Dusting of Mn-Containing Alloy 600 Based on Advanced Scale Characterization
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Galetz, M. C., Schlereth, C., White, E. M. H., Boll, T., Bik, M., Sitarz, M., Chen, W.-T., and Gleeson, B.
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- 2023
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4. Characterization of NiTiNb10.5 shape memory alloy: microstructural aspects and high-temperature oxidation behavior
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Martins Júnior, C.B., Silva, R., Gargarella, P., Gleeson, B., and Rovere, C.A.D.
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- 2023
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5. Role of Elemental Segregation on the Oxidation Behavior of Additively Manufactured Alloy 625
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de Leon Nope, G., Wang, G., Alvarado-Orozco, J. M., and Gleeson, B.
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- 2022
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6. Biosecurity and infectious disease control in pig production
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Richards, K., primary and Gleeson, B., additional
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- 2022
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7. Antibiotic usage and stewardship in the pork industry
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Mitchell, P., primary, Richards, K., additional, Gleeson, B., additional, van Barneveld, R., additional, Harrison, T., additional, van Breda, L., additional, Fogarty, R., additional, Hewson, K., additional, and Cutler, R., additional
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- 2022
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8. Detection and genetic diversity of porcine rotavirus A, B and C in eastern Australian piggeries
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Genz, B, primary, Gerszon, J, additional, Pollock, Y, additional, Gleeson, B, additional, Shankar, R, additional, Sellars, MJ, additional, and Moser, RJ, additional
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- 2023
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9. 56. Glaesserella australis – Exploring colonisation and antimicrobial resistance
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Sun, X., primary, Jenkin, S., additional, Gleeson, B., additional, Lobo, E.T., additional, Blackall, P.J., additional, Omaleki, L., additional, and Turni, C., additional
- Published
- 2021
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10. The use of oral fluids and sock samples for monitoring key pathogens in pig populations for surveillance purposes.
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Gerszon J, Büchse A, Genz B, Pollock Y, Gleeson B, Morris A, Sellars MJ, and Moser RJ
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- Animals, Swine, Coinfection veterinary, Coinfection microbiology, Coinfection epidemiology, Epidemiological Monitoring veterinary, Swine Diseases microbiology, Swine Diseases epidemiology, Swine Diseases virology
- Abstract
Despite the prevalence of co-infections and the association of over 50 viral and 46 bacterial pathogens with pig diseases, little is known about their simultaneous occurrence, particularly in commercial pig farming environments where health programs are in place. To address this knowledge gap, this study aimed to evaluate the pathogen threshold of respiratory and enteric pathogens in pig herds using the Pork MultiPath™ (PMP1 and PMP2, respiratory and enteric respectively) technology, which detects multiple pathogens simultaneously in a single reaction with high sensitivity and specificity. In this study the most prevalent respiratory pathogens, Mycoplasma hyrohinis, Pasteurella multocida, and Haemophilus parasuis detected by PMP1 were effectively controlled during the nursery stage through strategic treatment with tiamulin. Even though the major respiratory incidences were reduced, the recorded coughing and sneezing rates were associated with the levels of H. parasuis and M. hyrohinis, which were set at 1356 and 1275 copies/reaction, respectively. In addition, one of the identified co-infection patterns indicated a strong relationship between the occurrence of H. parasuis and M. hyorhinis at the sample and pen levels, highlighting the high likelihood of detecting these two pathogens together. Testing with enteric panel PMP2 revealed that the most frequently detected virulence factors during the early nursery stage were Escherichia coli genes for toxins - ST1, ST2, and fimbriae - F4 and F18. Moreover, a co-infection with Rotavirus B and C was often observed during the nursery stage, and a strong positive correlation between these two markers has been identified. Additionally, the levels of several markers, namely E. coli F4, F5, F18, LT, ST1, and ST2, have been associated with a higher likelihood of sickness in pig populations. In addition, the onset of Brachyspira pilosicoli during the nursery and grower stages was found to be associated with an increased risk of diarrhoea, with a set threshold at around 500 copies/reaction. Although simultaneous detection of multiple pathogens is not yet widely used in the pig industry, it offers a significant advantage in capturing the diversity and interactions of co-infections. Testing pooled samples with Pork MultiPath™ is cost-effective and practical to regularly monitor the health status of pig populations., Competing Interests: Declaration of Competing Interest J.G, B.G., R.J.M. and M.J.S. are affiliated with Genics Pty Ltd, which provides one of the methods used in the present paper (Pork MultiPath™) as a commercial service. A.B. works as an independent statistical consultant and was paid by Genics Pty Ltd for statistical analysis of PMP1 and PMP2 results., (Copyright © 2024 Elsevier B.V. All rights reserved.)
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- 2024
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11. Blood culture bottles remain efficient months after their expiration date: implications for low- and middle-income countries.
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Hardy L, Vermoesen T, Gleeson B, Ferreyra C, Dailey P, and Jacobs J
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- 2024
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12. Development of a Novel Fluorescent-Based Lateral Flow Assay for the Detection of Neisseria gonorrhoeae at the Point of Care.
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Gleeson B, Piton J, Mazzola L, McHugh S, Bender J, Lear M, Gavrikova T, Van Der Pol B, Daniels B, Osborn J, Dailey P, and Ferreyra C
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- Male, Female, Humans, Neisseria gonorrhoeae, Point-of-Care Systems, Chlamydia trachomatis, Sensitivity and Specificity, Chlamydia Infections diagnosis, Sexually Transmitted Diseases diagnosis, Gonorrhea diagnosis, Gonorrhea microbiology
- Abstract
Background: Neisseria gonorrhoeae (NG) has acquired significant resistance, primarily due to extensive and unwarranted antibiotic utilization over several decades. This resistance has largely been associated with the syndromic management of sexually transmitted infections, particularly in low- and middle-income countries where affordable point of care tests are unavailable. To address this diagnostic gap, FIND has developed a low-cost lateral flow assay for the detection of NG at the point of care., Methods: The early performance of the lateral flow assay was evaluated using frozen clinical samples. Limit of detection, inclusivity, and exclusivity studies were performed using well-characterized NG strains, common commensal genital microorganisms, and other Neisseria bacteria. Subsequently, clinical performance was evaluated at 2 sexual health clinics in Birmingham, Alabama., Results: The observed limit of detection with reference NG strains was 5 × 103 CFU/mL. Inclusivity was demonstrated for 31 NG strains. Exclusivity testing showed no cross-reactivity with 28 non-Neisseria and nongonococcal Neisseria species; cross-reactivity was observed with Neisseria meningitidis, Neisseria lactamica, and Neisseria polysaccharea. The lateral flow assay demonstrated clinical sensitivity and specificity of 78.6% and 100% in female vaginal swabs and 100% and 89.7% in male urine, respectively., Conclusions: FIND has developed a lateral flow assay that aligns with the majority of the World Health Organization Target Product Profile criteria for confirming or excluding NG infection at the point of care. The NG lateral flow assay has now achieved design freeze (final device optimization) and is ready for technology transfer to a manufacturing partner. This test has the potential to support the shift in patient management from a syndromic to an etiological approach., Competing Interests: Conflict of Interest and Sources of Funding: B.V.D.P. reports receiving grants to her institution or consulting fees/honoraria from Abbott Molecular, Abbott Rapid Diagnostics, Becton Dickinson, BioFire, Cepheid, Cue, Detect, FIND, Hologic, Rheonix, and Roche., (Copyright © 2023 The Author(s). Published by Wolters Kluwer Health, Inc. on behalf of the American Sexually Transmitted Diseases Association.)
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- 2024
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13. Affordable blood culture systems from China: in vitro evaluation for use in resource-limited settings.
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Hardy L, Vermoesen T, Genbrugge E, Natale A, Franquesa C, Gleeson B, Ferreyra C, Dailey P, and Jacobs J
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- Humans, Resource-Limited Settings, Bacteria, China, Blood Culture, Sepsis diagnosis
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Background: Bloodstream infections (BSI) pose a significant threat due to high mortality rates and the challenges posed by antimicrobial resistance (AMR). In 2019, an estimated 4.95 million deaths were linked to bacterial AMR. The highest impact was seen in resource-limited settings (RLS). For diagnosis of BSI, performant continuously-monitoring blood culture systems (CMBCS) have been optimized. However, in RLS, the implementation of CMBCS is hindered by budget constraints and unsuitable environmental conditions. Manufacturers from growing economies are currently producing affordable in vitro diagnostics, which could fill the gap in capacity, but so far these are not established outside their domestic markets., Methods: This study evaluated the performance, usability, and interchangeability of Chinese CMBCS in a laboratory setting using simulated blood cultures with a panel of 20 BSI-associated strains. Four systems were selected for the assessment: Autobio BC60, Mindray TDR60, Scenker Labstar50, and DL-biotech DL-60., Findings: Overall, all evaluated CMBCS demonstrated good performance with high yield (96.7-100%) and specificity (97.5-100%), comparable to the reference system (bioMérieux 3D). In addition, when used as "manual" blood cultures in a conventional incubator with visual growth detection, performance was also satisfactory: yield was between 90 and 100% and specificity was 100% for all BCBs. Both the CMBCS and the BCBs were easy to use and lot-to-lot variability in BCBs was minimal. The interchangeability testing indicated that the BCBs from different brands (all except Scenker) were compatible with the various automates, further highlighting the potential for a harmonized "universal BCB.", Interpretation: Based on this in vitro study, we recommend the use of these systems in settings with challenging environments and limited resources. The Autobio system performed best for automatic detection and DL-Biotech BCBs for manual cultures respectively (combination of performance, price, usability). The appropriateness for use in RLS should still be confirmed in a field study., Funding: The study was funded by FIND., Competing Interests: Declaration of interests PJD has received consulting fees from FIND. The other authors declare no competing interests., (Copyright © 2024 The Author(s). Published by Elsevier B.V. All rights reserved.)
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- 2024
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14. Novel lateral flow assay for point-of-care detection of Neisseria gonorrhoeae infection in syndromic management settings: a cross-sectional performance evaluation.
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Peters RPH, Klausner JD, Mazzola L, Mdingi MM, Jung H, Gigi RMS, Piton J, Daniels J, de Vos L, Adamson PC, Gleeson B, and Ferreyra C
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- Humans, Male, Female, Young Adult, Adult, Cross-Sectional Studies, Point-of-Care Systems, Chlamydia trachomatis, Neisseria gonorrhoeae, Sensitivity and Specificity, Gonorrhea diagnosis, Chlamydia Infections diagnosis, Vaginal Discharge
- Abstract
Background: A rapid and affordable point-of-care test is a priority for Neisseria gonorrhoeae control. WHO and Foundation for Innovative New Diagnostics (FIND) have a target product profile for a non-molecular N gonorrhoeae rapid point-of-care test that requires a clinical sensitivity of greater than 80% and a specificity over 95% to be considered useful in syndromic management; test turnaround time should be 30 min or under, and the test should cost less than US$3. A novel lateral flow assay (LFA) was developed to achieve that profile., Methods: In this cross-sectional study we evaluated the performance of the novel N gonorrhoeae lateral flow assay (NG-LFA) at the primary health-care level in South Africa. Male patients with urethral discharge syndrome and female patients with vaginal discharge syndrome were recruited from five primary health-care facilities in the Buffalo City Metropolitan Municipality health district of South Africa. First-void urine specimens and nurse-collected vaginal swabs were tested in-facility with the NG-LFA and Xpert CT/NG PCR assay. N gonorrhoeae multi-antigen sequence typing (NG-MAST) was performed on all LFA positive specimens., Findings: Between March 7, and Sept 19, 2022, we enrolled 200 male patients with urethral discharge and 200 female patients with vaginal discharge. The median age of male patients was 24 years (IQR 21-31 years), and the median age of female patients was 25 years (IQR 21-32 years). In addition, 23 male patients and 12 female patients who presented at the facility with a partner notification slip were enrolled of whom one (4%) and five (42%) were symptomatic, respectively. NG-LFA and Xpert results were available for all participants. In urine specimens, NG-LFA sensitivity was 96·1% (Wilson 95% CI 91·2-98·3; 123 LFA-positive among 128 PCR-positive specimens) and 91·7% in vaginal swab specimens (78·2-97·1; 33 LFA-positive among 36 PCR-positive). The specificity was 97·2% in urine specimens (90·4-99·2; 70 LFA-negative among 72 PCR-negative) and 96·3% in vaginal specimens (92·2-98·3; 158 LFA-negative among 164 PCR-negative). In 156 LFA-positive specimens, NG-MAST showed 93 different sequence types., Interpretation: The novel NG-LFA had excellent clinical sensitivity and specificity in symptomatic male and female patients. The test met the optimal requirement for sensitivity and the minimal requirement for specificity specified in the target product profile. NG-LFA could provide an important tool to optimise clinical management and reduce excess antibiotic use in settings without direct access to laboratory testing., Funding: Global Antimicrobial Resistance Innovation Fund (GAMRIF) via FIND and National Institutes of Health., Competing Interests: Declaration of interests The Foundation for Professional Development (RPHP, MMM and LdV) received institutional funding from FIND for this work. LM is employed as a consultant by FIND. All other authors declare no competing interests., (Copyright © 2024 The Author(s). Published by Elsevier Ltd. This is an Open Access article under the CC BY 4.0 license. Published by Elsevier Ltd.. All rights reserved.)
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- 2024
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15. Implementation considerations for a point-of-care Neisseria gonorrhoeae rapid diagnostic test at primary healthcare level in South Africa: a qualitative study.
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de Vos L, Daniels J, Gebengu A, Mazzola L, Gleeson B, Blümel B, Piton J, Mdingi M, Gigi RMS, Ferreyra C, Klausner JD, and Peters RPH
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- Humans, South Africa, Rapid Diagnostic Tests, Point-of-Care Testing, Primary Health Care, Neisseria gonorrhoeae, Point-of-Care Systems
- Abstract
Background: South Africa maintains an integrated health system where syndromic management of sexually transmitted infections (STI) is the standard of care. An estimated 2 million cases of Neisseria gonorrhoeae (N. gonorrhoeae) occur in South Africa every year. Point-of-care diagnostic tests (POCT) may address existing STI control limitations such as overtreatment and missed cases. Subsequently, a rapid lateral flow assay with fluorescence-based detection (NG-LFA) with a prototype reader was developed for N. gonorrhoeae detection showing excellent performance and high usability; however, a better understanding is needed for device implementation and integration into clinics., Methods: A qualitative, time-series assessment using 66 in-depth interviews was conducted among 25 trained healthcare workers involved in the implementation of the NG-LFA. Findings were informed by the Normalization Process Theory (NPT) as per relevant contextual (strategic intentions, adaptive execution, and negotiation capacity) and procedural constructs (coherence, cognitive participation, collective action, reflexive monitoring) to examine device implementation within primary healthcare levels. Interviews were audio-recorded, transcribed, and then analyzed using a thematic approach guided by NPT to interpret results., Results: Overall, healthcare workers agreed that STI POCT could guide better STI clinical decision-making, with consideration for clinic integration such as space constraints, patient flow, and workload. Perceived NG-LFA benefits included enhanced patient receptivity and STI knowledge. Further, healthcare workers reflected on the suitability of the NG-LFA given current limitations with integrated primary care. Recommendations included sufficient STI education, and appropriate departments for first points of entry for STI screening., Conclusions: The collective action and participation by healthcare workers in the implementation of the NG-LFA revealed adaptive execution within the current facility environment including team compositions, facility-staff receptivity, and STI management experiences. User experiences support future clinic service integration, highlighting the importance of further assessing patient-provider communication for STI care, organizational readiness, and identification of relevant departments for STI screening., (© 2024. The Author(s).)
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- 2024
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16. Development and internal validation of a Neonatal Healthcare-associated infectiOn Prediction score (NeoHoP score) for very low birthweight infants in low-resource settings: a retrospective case-control study.
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Lloyd LG, van Weissenbruch MM, Dramowski A, Gleeson B, Ferreyra C, and Bekker A
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- Infant, Newborn, Humans, Infant, Retrospective Studies, Case-Control Studies, Risk Factors, Delivery of Health Care, Infant, Very Low Birth Weight, Cross Infection diagnosis, Cross Infection epidemiology
- Abstract
Background and Objectives: Early diagnosis of neonatal infection is essential to prevent serious complications and to avoid unnecessary use of antibiotics. The prevalence of healthcare-associated infections (HAIs) among very low birthweight (VLBW; <1500 g) infants is 20%; and the mortality in low-resource settings can be as high as 70%. This study aimed to develop an Infection Prediction Score to diagnose bacterial HAIs., Methods: A retrospective cohort of VLBW infants investigated for HAI was randomised into two unmatched cohorts. The first cohort was used for development of the score, and the second cohort was used for the internal validation thereof. Potential predictors included risk factors, clinical features, interventions, and laboratory data. The model was developed based on logistic regression analysis., Results: The study population of 655 VLBW infants with 1116 episodes of clinically suspected HAIs was used to develop the model. The model had five significant variables: capillary refill time >3 s, lethargy, abdominal distention, presence of a central venous catheter in the previous 48 hours and a C reactive protein ≥10 mg/L. The area below the receiver operating characteristic curve was 0.868. A score of ≥2 had a sensitivity of 54.2% and a specificity of 96.4%., Conclusion: A novel Infection Prediction Score for HAIs among VLBW infants may be an important tool for healthcare providers working in low-resource settings but external validation needs to be performed before widespread use can be recommended., Competing Interests: Competing interests: None declared., (© Author(s) (or their employer(s)) 2023. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.)
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- 2023
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17. Usability of a novel lateral flow assay for the point-of-care detection of Neisseria gonorrhoeae: A qualitative time-series assessment among healthcare workers in South Africa.
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de Vos L, Daniels J, Gebengu A, Mazzola L, Gleeson B, Piton J, Mdingi M, Gigi R, Ferreyra C, Klausner JD, and Peters RPH
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- Female, Humans, Neisseria gonorrhoeae, South Africa, Health Personnel, Point-of-Care Systems, Sexually Transmitted Diseases diagnosis
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Accurate and user-friendly rapid point-of-care diagnostic tests (POCT) are needed to optimize treatment of Neisseria gonorrhoeae, especially in low-resource settings where syndromic management is the standard of care for sexually transmitted infections. This study aimed to assess the acceptability and usability of a novel lateral flow assay and portable reader for the point-of-care detection of N. gonorrhoeae infection (NG-LFA). This mixed-methods study was conducted as part of a diagnostic performance and usability evaluation of a prototype NG-LFA for detection of N. gonorrhoeae in symptomatic men and women at primary healthcare facilities in the Buffalo City Metro, South Africa. The Standardized System Usability Scale (SUS) was administered, and in-depth interviews were conducted among healthcare professionals (HCPs) and fieldworkers (FWs) at pre-implementation, initial use and 3- and 6-month study implementation to assess user expectations, practical experience, and future implementation considerations for the NG-LFA. Data collection and analysis was guided by the Health Technology Adoption Framework, including new health technology attributes, learnability, satisfaction, and suitability. The framework was adapted to include perceived durability. A total of 21 HCPs and FWs were trained on the NG-LFA use. SUS scores showed good to excellent acceptability ranging from 78.8-90.6 mean scores between HCPs and FWs across study time points. All transcripts were coded using Dedoose and qualitative findings were organized by learnability, satisfaction, suitability, and durability domains. Usability themes are described for each time point. Initial insecurity dissipated and specimen processing dexterity with novel POCT technology was perfected over time especially amongst FWs through practical learning and easy-to-use instructions (learnability). Participants experienced both positive and negative test results, yielding perceived accuracy and minimal testing challenges overall (satisfaction). By 3- and 6-month use, both HCPs and FWs found the NG-LFA convenient to use in primary health care facilities often faced with space constraints and outlined perceived benefits for patients (suitability and durability). Findings show that the NG-LFA device is acceptable and usable even amongst paraprofessionals. High SUS scores and qualitative findings demonstrate high learnability, ease-of-use and suitability that provide valuable information for first-step scale-up requirements at primary healthcare level. Minor prototype adjustments would enhance robustness and durability aspects., Competing Interests: The authors have declared that no competing interests exist., (Copyright: © 2023 de Vos et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.)
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- 2023
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18. More-than-care: People with intellectual disability and emerging vulnerability during pandemic lockdown.
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van Holstein E, Wiesel I, Bigby C, and Gleeson B
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This paper offers more-than-care as a framework for analysing how vulnerability emerges in the lives of people with intellectual disability beyond relations of care. More-than-care detaches vulnerability from the identity category of disability. It provides a framework for conceptualising vulnerability in an unequal, neoliberalising, and ableist world and sheds new light on the ever-evolving constitution of vulnerability and disability. This intervention breaks with conceptions of vulnerability centred on care needs that leave other circumstances that inform vulnerabilities unexamined. Importantly, the framework shifts responsibility for managing vulnerabilities away from carers alone. The more-than-care framework is grounded in socio-material conceptualisations of disability and advances a tripartite framing of vulnerability. First, it grounds studies of vulnerability in histories of spatially uneven investment in infrastructure and resources that shape how care and other practices can assemble to produce, challenge, and manage vulnerability. Second, it recalibrates dominant conceptions of the temporality of vulnerability to ensure sensitivity to the unpredictability of emergent vulnerabilities. Third, in following a socio-material conceptualisation of intellectual disability, more-than-care expands discussions about agency in the context of vulnerability. These concepts are empirically examined through an analysis of how vulnerability emerges in the lives of four self-advocates with intellectual disability during Melbourne's first and second COVID-19 lockdowns. The analysis shows that vulnerability was highly dynamic and unpredictable as it emerged in complex socio-material assemblages that included care arrangements, embodied experiences and agencies, and past instances of neglect and exploitation., (The information, practices and views in this article are those of the author(s) and do not necessarily reflect the opinion of the Royal Geographical Society (with IBG). © 2022 The Authors. Transactions of the Institute of British Geographers published by John Wiley & Sons Ltd on behalf of Royal Geographical Society (with The Institute of British Geographers).)
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- 2023
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19. The impact of benzodiazepine exposure on treatment retention in an open-access methadone program: A retrospective cohort study.
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Morford KL, Tetrault JM, Zhou B, Li F, Gleeson B, Edelman EJ, Stein MD, Barry DT, and Madden L
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- Humans, Benzodiazepines adverse effects, Retrospective Studies, Opiate Substitution Treatment, Analgesics, Opioid therapeutic use, Methadone, Opioid-Related Disorders drug therapy, Opioid-Related Disorders rehabilitation
- Abstract
Background: Open-access opioid treatment programs (OTP) offer same-day access to methadone without an appointment and aim to minimize treatment barriers that often reduce admission and/or retention. We explored whether patients with benzodiazepine exposure at treatment entry would have similar 12-month retention compared to those without benzodiazepine exposure., Methods: We conducted a retrospective cohort study of 2968 patients consecutively initiated on methadone between January 2015 and February 2017 at an open-access OTP. The sample was stratified into benzodiazepine-exposed and nonexposed groups based on intake urine toxicology. Group comparison of 12-month retention was conducted. Kaplan Meier analysis compared time to methadone treatment discontinuation between groups with a log-rank test. Multivariable Cox regression was performed to compare retention by baseline benzodiazepine exposure with adjustment for confounders., Results: Overall, 31% of patients with benzodiazepine exposure (n = 171) and 31% without exposure (n = 2423) were retained at 12 months (p = 0.95). Median treatment duration was 182 days (95% CI, 152-239) and 175 days (95% CI, 156-196) for patients with and without benzodiazepine exposure, respectively. Kaplan-Meier analysis showed no significant difference in treatment duration between groups (log-rank test p = 0.73). Cox regression found no difference in treatment retention between groups (adjusted Hazard Ratio= 1.03, 95% CI, 0.91-1.16)., Conclusions: In this cohort of patients receiving methadone at an open-access OTP, benzodiazepine exposure at intake was not observed to impact 12-month treatment retention or duration. These findings support U.S. Food and Drug Administration (FDA) recommendations to not withhold medications for opioid use disorder from patients taking benzodiazepines., Competing Interests: Conflict of interest All authors have no declarations or conflicts of interest to report., (Copyright © 2022 Elsevier B.V. All rights reserved.)
- Published
- 2022
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20. Diagnostic tests to mitigate the antimicrobial resistance pandemic-Still the problem child.
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Ferreyra C, Gleeson B, Kapona O, and Mendelson M
- Abstract
Competing Interests: The authors have declared that no competing interests exist.
- Published
- 2022
- Full Text
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